set up Windows password

I would like to set up my computer so that a password is required to start Windows. The way it is set up now, a box comes up that asks me to enter a user name and password to log onto the network, but I don't have a network, and all I have to do is hit Cancel and it starts Windows anyway. I'm trying to limit my kids' usage of the computer and especially the internet. Also, do you recommend any certain filtering software for the internet?

 

Try looking around here for some pointers.

Good luck,